@misc{Helwig_Martin_(1516-1574)_[Silesiae,
 author={Helwig, Martin (1516-1574)},
 address={Breslau},
 howpublished={online},
 publisher={Rörer, Johann Günther},
 language={ger},
 title={[Silesiae typus descriptus et editus a Martino Heilwig Neissense]},
 keywords={16 w., drzeworyt, mapy, Rübezahl, Śląsk, kartografia, Atlas Machnizkich t. V},
}